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22 Cards in this Set

  • Front
  • Back
a trait that increases the ability of an individuals to survive and reproduce compared to individuals without the trait
a self feeder. Normally a photosynthetic producer.
total number of species in a population and the resulting complexity of interactions between them.
that part of earth inhabited by living organisms (includes both living and nonliving components)
the smallest unit of life consisting of a minimum of an outer membrane that encloses a water medium containing organic molecules, including genetic material composed of DNA
The final operation in the scientific method. A decision made about the validity of a hypothesis on the basis of experimental evidence
That portion of an experiment in which all possible variables are held constant
Referring to cells of organisms of the domain eukarya. Eukaryotic cells have genetic material enclosed within a membrane bound nucleus and contain other membrane bound organelles
The descent of modern organisms with modifications of preexisting life forms
The third operation in the scientific method. The testing of a hypothesis by further observations leading to conclusions
An organism that eats other organisms. A consumer.
The maintenance of a relatively constant environment required for the optimal function of cells, maintained by the coordinated activity of numerous regulatory mechanisms- including the respiratory, endocrine, circulatory, and excretory systems.
The second operation in the scientific method. It is a supposition based on previous observations that is offered as an explanation for observed phenomenon and is used as the basis for further observations or experiments.
It is the sum of all chemical reactions that occur within a single cell or within all the cells of a multicultural organism.
natural selection
The unequal survival and reproduction or organisms due to environmental forces, resulting in the preservation of favorable adaptation. Usually, natural selection refers specifically to differential survival and reproduction on the basis of genetic differences among individuals.
Atomic- the central region of an atom, consisting of protons and neutrons.
Cellular- The membrane bound organelle of eukaryotic cells that contains the cells genetic material.
The first operation of the scientific method; the noting of specific phenomenon leading to the formulation of a hypothesis.
Referring to the cells of the domains of bacteria or archaea. Prokaryotic cells have genetic material that is not enclosed in a membrane bound nucleus; they lack other membrane bound organelles.
scientific method
it is a rigorous procedure for making observations of specific phenomenon in searching for the order underlying those phenomena; consists of four operations- observation, hypothesis, experiment, conclusion.
scientific theory
a general explanation of natural phenomena developed through extensive and reproducible observations; more general and reliable than a hypothesis.
singled celled; most members of domains bacteria and archaea and the kingdom protista are unicellular
A condition, particularly in scientific experiments, that is subject to change.